mirror of
git://sourceware.org/git/glibc.git
synced 2024-12-27 04:41:02 +08:00
a8c79c4088
2007-03-22 Jakub Jelinek <jakub@redhat.com> [BZ #3427] * sysdeps/x86_64/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions both in SW and MXCSR. * sysdeps/x86_64/fpu/feupdateenv.c: New file. * sysdeps/x86_64/fpu/feenablxcpt.c (feenableexcept): Remove dead code. * sysdeps/x86_64/fpu/fedisblxcpt.c (fedisableexcept): Likewise. * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions in MXCSR if SSE is available. * sysdeps/i386/fpu/feupdateenv.c: Include unistd.h, dl-procinfo.h and ldsodefs.h. (__feupdateenv): Query exceptions also from MXCSR if SSE is available. Fix comment typo. * sysdeps/ia64/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions. Return 0 rather than 1. * sysdeps/ia64/fpu/feupdateenv.c (feupdateenv): Fix comment typo. Remove incorrect part of a comment. Fix argument to feraiseexcept. * math/test-fenv.c (feholdexcept_tests): New function. (main): Call it. 2007-01-05 Richard B. Kreckel <kreckel@ginac.de> [BZ #3427] * sysdeps/i386/fpu/feholdexcpt.c (feholdexcept): Clear all exceptions in SW.
48 lines
1.5 KiB
C
48 lines
1.5 KiB
C
/* Enable floating-point exceptions.
|
|
Copyright (C) 2001, 2007 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
Contributed by Andreas Jaeger <aj@suse.de>, 2001.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA. */
|
|
|
|
#include <fenv.h>
|
|
|
|
int
|
|
feenableexcept (int excepts)
|
|
{
|
|
unsigned short int new_exc, old_exc;
|
|
unsigned int new;
|
|
|
|
excepts &= FE_ALL_EXCEPT;
|
|
|
|
/* Get the current control word of the x87 FPU. */
|
|
__asm__ ("fstcw %0" : "=m" (*&new_exc));
|
|
|
|
old_exc = (~new_exc) & FE_ALL_EXCEPT;
|
|
|
|
new_exc &= ~excepts;
|
|
__asm__ ("fldcw %0" : : "m" (*&new_exc));
|
|
|
|
/* And now the same for the SSE MXCSR register. */
|
|
__asm__ ("stmxcsr %0" : "=m" (*&new));
|
|
|
|
/* The SSE exception masks are shifted by 7 bits. */
|
|
new &= ~(excepts << 7);
|
|
__asm__ ("ldmxcsr %0" : : "m" (*&new));
|
|
|
|
return old_exc;
|
|
}
|